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All results from a given calculation for HCOOC2H5 (Ethyl formate)

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS trans 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-268.265842
Energy at 298.15K-268.272960
HF Energy-268.265842
Nuclear repulsion energy178.347541
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B1B95/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3176 3015 18.86      
2 A' 3104 2946 8.84      
3 A' 3094 2938 66.20      
4 A' 3093 2936 21.58      
5 A' 1868 1773 293.13      
6 A' 1545 1466 7.35      
7 A' 1526 1448 2.54      
8 A' 1448 1374 13.56      
9 A' 1421 1349 2.02      
10 A' 1393 1322 2.55      
11 A' 1264 1200 395.18      
12 A' 1152 1093 12.29      
13 A' 1062 1008 20.76      
14 A' 880 836 9.43      
15 A' 804 763 3.74      
16 A' 382 362 6.68      
17 A' 221 210 7.25      
18 A" 3183 3022 30.09      
19 A" 3148 2989 8.65      
20 A" 1515 1438 6.31      
21 A" 1294 1228 0.94      
22 A" 1194 1133 5.29      
23 A" 1047 994 0.49      
24 A" 807 766 1.06      
25 A" 358 340 20.98      
26 A" 238 226 2.00      
27 A" 34 32 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 20123.9 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 19103.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B1B95/6-31G*
ABC
0.59742 0.09774 0.08672

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.167 -0.273 0.000
C2 -0.687 -0.559 0.000
O3 0.000 0.704 0.000
C4 1.330 0.622 0.000
O5 1.971 -0.394 0.000
H6 -2.726 -1.211 0.000
H7 -2.453 0.298 0.886
H8 -2.453 0.298 -0.886
H9 -0.375 -1.125 -0.881
H10 -0.375 -1.125 0.881
H11 1.756 1.635 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50732.37683.60934.14011.09231.09171.09172.17122.17124.3617
C21.50731.43822.33752.66372.14052.15342.15341.09241.09243.2835
O32.37681.43821.33222.25653.33152.63912.63912.06452.06451.9870
C43.60932.33751.33221.20184.45083.89823.89822.59502.59501.0985
O54.14012.66372.25651.20184.76804.56474.56472.61062.61062.0402
H61.09232.14053.33154.45084.76801.77111.77112.51232.51235.3088
H71.09172.15342.63913.89824.56471.77111.77103.07632.51874.5034
H81.09172.15342.63913.89824.56471.77111.77102.51873.07634.5034
H92.17121.09242.06452.59502.61062.51233.07632.51871.76163.5960
H102.17121.09242.06452.59502.61062.51232.51873.07631.76163.5960
H114.36173.28351.98701.09852.04025.30884.50344.50343.59603.5960

picture of Ethyl formate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 107.573 C1 C2 H9 112.284
C1 C2 H10 112.284 C2 C1 H6 109.824
C2 C1 H7 110.889 C2 C1 H8 110.889
C2 O3 C4 115.021 O3 C2 H9 108.559
O3 C2 H10 108.559 O3 C4 O5 125.793
O3 C4 H11 109.293 O5 C4 H11 124.914
H6 C1 H7 108.374 H6 C1 H8 108.374
H7 C1 H8 108.412 H9 C2 H10 107.474
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.511      
2 C -0.086      
3 O -0.423      
4 C 0.388      
5 O -0.427      
6 H 0.174      
7 H 0.182      
8 H 0.182      
9 H 0.184      
10 H 0.184      
11 H 0.154      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.977 0.539 0.000 2.049
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.317 4.682 0.000
y 4.682 -28.911 0.000
z 0.000 0.000 -28.850
Traceless
 xyz
x -3.436 4.682 0.000
y 4.682 1.673 0.000
z 0.000 0.000 1.764
Polar
3z2-r23.527
x2-y2-3.406
xy4.682
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.830 0.234 0.000
y 0.234 5.543 0.000
z 0.000 0.000 4.188


<r2> (average value of r2) Å2
<r2> 134.107
(<r2>)1/2 11.580